ROS request EB and LVL2 Rates in an ATLAS combined cosmic run.
The run number is 91900 which was triggered by RPC and L1Calo.
The EB request rate is 100 Hz, the ROSs of the detectors participating to LVL2 algorithms
see more request rate. The high rate of ID requests is due to the various full scan tracking
algorithms. The rate on TILE is due to an algorithm doing full scan to find muon MIP signal.

The Data Taking Efficiency, defined as the ratio of the running time during beam time to beam time, is shown. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor. The beam time is defined by the presence of two circulating stable beams. The width of each bar is a measure of the stable beam (shown in gray) availability during LHC fills. Each green bar corresponds to an average efficiency calculated during a fill period. The absence of filled bars indicates a period of no stable beams. Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time. Average efficiency calculated over the whole period is 96.5%.

The Data Taking Efficiency, defined as the ratio of the running time during beam time to beam time, is shown. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor. The beam time is defined by the presence of two circulating stable beams. The width of each bar is a measure of the stable beam (shown in gray) availability during 24 hours. Each green bar corresponds to an average efficiency calculated for a period of 24 hours. The absence of filled bars indicates a period of no stable beams. Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time. Average efficiency, calculated every 24 hours for the last 24 hours , over the whole period is 96.5%.

The Data Taking Efficiency, defined as the ratio of the running time during beam time to beam time, is shown. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor. The beam time is defined by the presence of two circulating stable beams. The width of each bar is a measure of the stable beam (shown in gray) availability during 24 hours. Each green bar corresponds to an average efficiency calculated for a period of 24 hours. The absence of filled bars indicates a period of no stable beams. Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time. Average efficiency, calculated every 24 hours for the last 24 hours, over the whole period is 96.5%.

The Data Taking Efficiency, defined as the ratio of the running time during beam time to beam time, is shown. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor. The beam time is defined by the presence of two circulating stable beams. Each point corresponds to an average efficiency calculated for a period of 24 hours. The size of the horizontal error bars on each data point is a measure of the stable beam availability during 24 hours. The longest bar corresponds to 24 hours. The absence of data points indicates a period of no stable beams. Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time. Average efficiency, calculated every 24 hours for the last 24 hours, over the whole period is 96.5%.

In the online display screenshot, the beam time, defined by the presence of two circulating stable beams, the run status and the data taking efficiency are shown in blue, green and red respectively. The Data Taking Efficiency is defined as the ratio of the running time during beam time to beam time. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor. The blue and green curves have binary scale (on/off) indicating the presence of stable beams and ongoing ATLAS run. Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time.

ATLAS Run efficiency is calculated for 2 independent conditions: “ATLAS running” and “ATLAS running while Ready for Physics”.

Prior to the declaration of 'stable beams' some detector systems are in a standby state (e.g. reduced low and/or high voltages). "ATLAS Ready for Physics" condition is defined by 'stable beams' and detector systems at their operational settings together with a High Level Trigger menu corresponding to these settings.

Covered time interval: 30 Mar 08h00 - 11 October 08h00

The weekly averages of three independent quantities, ATLAS Run Efficiency, ATLAS Run Efficiency while Ready for Physics and the stable beam availability are shown. Note that the efficiencies are not luminosity weighted.
The Run Efficiency is defined as the ratio of the running time during beam time to beam time. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor. The beam time is defined by the presence of two circulating stable beams.
The width of each bar represents a week in which the availability of stable beams are shown with the red histogram with the scale on the right hand side. The average run efficiency calculated during each week is shown by the filled green (ATLAS is running) and grey (ATLAS is running while Ready for Physics) histograms. The absence of a bar in the plot indicates a week with no stable beams.
Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time.
Average efficiency calculated over the whole period is 96.5% and 93.0% for “ATLAS Ready for Physics” condition.

Three independent quantities, LHC stable beam availability (yellow), ATLAS running (green) and ATLAS running while Ready for Physics (grey) accumulated times are shown. Note that the durations are not luminosity weighted.
The beam availability is defined by the presence of two circulating stable beams. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor.
The flat sections of the curves indicate periods of no stable beams. The lower values of accumulated run times with respect to stable beam time indicate efficiency losses during runs.
Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time.
Average efficiency calculated over the whole period is 96.5% and 93.0% for “ATLAS Ready for Physics” condition.

Resource allocation curves for the HLT according to the TDAQ paper model,
using as constraint the Level-2 latency and the global output rate.
Fixing the measured latency of the EF, it is possible to choose the operating point (i.e. the number of XPU racks dedicate to each trigger level) by fixing the event building rate.

LumiCPU.pdf: CPU Usage in the Event Filter farm, as a function of the luminosity. Each point corresponds to the peak of the CPU usage averaged over the entire EF farm, for a specific run; the peak corresponds in time to the highest luminosity at beginning of the fill. The points are indicatively grouped per different trigger menus.

ROS_TDAQWeek_pg12.pdf: Rate limits on ROS and their improvement with CPU update, as measured for 2 ROLs per RoI and two Gbit Ethernet links.

In the online display screenshot, the beam time, defined by the presence of two circulating stable beams, the run status and the data taking efficiency are shown in blue, green and red respectively. The Data Taking Efficiency is defined as the ratio of the running time during beam time to beam time. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor. The blue and green curves have binary scale (on/off) indicating the presence of stable beams and ongoing ATLAS run. Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time.

In the online display screenshot, the Level1 rate, the beam time, defined by the presence of two circulating stable beams and the run status are shown in red, blue and green, respectively. The blue and green curves have binary scale (on/off) indicating the presence of stable beams and ongoing ATLAS run. Reasons for no or low LVL1 rate are stop of the run during beam time to work on a subsystem (e.g. at 19:00 in this plot) and possible trigger holds due to a sub-system issuing busy for a brief period of time (e.g. at 17:30 in this plot).

CPU Usage in the Event Filter farm, as a function of the luminosity. Each point corresponds to the peak of the CPU usage averaged over the entire EF farm, for a specific run; the peak corresponds in time to the highest luminosity at beginning of the fill. The points are indicatively grouped per different trigger menus.

The Data Taking Efficiency, defined as the ratio of the running time during beam time to beam time, is shown. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor. The beam time is defined by the presence of two circulating stable beams. The width of each bar is a measure of the stable beam (shown in gray) availability during 24 hours. Each green bar corresponds to an average efficiency calculated for a period of 24 hours. The absence of filled bars indicates a period of no stable beams. Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time. Average efficiency, calculated every 24 hours for the last 24 hours , over the whole period is 96.5%.

The Data Taking Efficiency, defined as the ratio of the running time during beam time to beam time, is shown. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor. The beam time is defined by the presence of two circulating stable beams. Each point corresponds to an average efficiency calculated for a period of 24 hours. The size of the horizontal error bars on each data point is a measure of the stable beam availability during 24 hours. The longest bar corresponds to 24 hours. The absence of data points indicates a period of no stable beams. Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time. Average efficiency, calculated every 24 hours for the last 24 hours, over the whole period is 96.5%.

The Data Taking Efficiency, defined as the ratio of the running time during beam time to beam time, is shown. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor. The beam time is defined by the presence of two circulating stable beams. The width of each bar is a measure of the stable beam (shown in gray) availability during LHC fills. Each green bar corresponds to an average efficiency calculated during a fill period. The absence of filled bars indicates a period of no stable beams. Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time. Average efficiency calculated over the whole period is 96.5%.

The Data Taking Efficiency, defined as the ratio of the running time during beam time to beam time, is shown. The running time incorporates the dead time fraction during each Luminosity Block reported by the Central Trigger Processor. The beam time is defined by the presence of two circulating stable beams. The width of each bar is a measure of the stable beam (shown in gray) availability during 24 hours. Each green bar corresponds to an average efficiency calculated for a period of 24 hours. The absence of filled bars indicates a period of no stable beams. Reasons for lower efficiency are stop of the run during beam time to work on a subsystem and possible trigger holds due to a sub-system issuing busy for a brief period of time. Average efficiency, calculated every 24 hours for the last 24 hours, over the whole period is 96.5%.